Thread: unable to execute the mail code

hi i am unable to run this java mail code can any body tell me whats wrong in tis code or may be whats the error!!

public class Class1 {
    final String senderEmailID = "from@gmail.com";
    final String senderPassword = "password";
     final String emailSMTPserver = "smtp.gmail.com";
     final String emailServerPort = "465";
     String receiverEmailID = null;
     String emailSubject = null;
     String emailBody = null;
     public Class1(String receiverEmailID, String emailSubject, String emailBody) 
     {
 this.receiverEmailID=receiverEmailID;
 this.emailSubject=emailSubject;
 this.emailBody=emailBody;
        Properties props = new Properties();
         props.put("mail.smtp.user",senderEmailID);
                    props.put("mail.smtp.host", emailSMTPserver);
                      props.put("mail.smtp.port", emailServerPort);
            props.put("mail.smtp.starttls.enable", "true");
                      props.put("mail.smtp.auth", "true");
                  SecurityManager security;
        security = System.getSecurityManager();
             System.out.println("security");
try {
            Authenticator auth;
            auth = new SMTPAuthenticator();
                       Session session;
            session = Session.getInstance(props, auth);
                     MimeMessage msg;
            msg = new MimeMessage(session);
                        msg.setText(emailBody);
             msg.setSubject(emailSubject);
                      msg.setFrom(new InternetAddress(senderEmailID));
                      msg.addRecipient(Message.RecipientType.TO,
         new InternetAddress(receiverEmailID));
                          Transport.send(msg);
            } catch (Exception mex) {
         mex.printStackTrace();
         }}
private class SMTPAuthenticator extends javax.mail.Authenticator {
     public PasswordAuthentication getPasswordAuthentication() {
             return new PasswordAuthentication(senderEmailID, senderPassword);
         }
     }
 public static void main(String[] args) {
       System.out.println("start");
        Class1 class1;
        class1 =
                new Class1("to@gmail.com","Test Mail from me","Here goes the body");
        System.out.println("end");
    }
}

i get an error as this

javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 465, response: -1
	at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1949)
	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:654)
	at javax.mail.Service.connect(Service.java:317)
	at javax.mail.Service.connect(Service.java:176)
	at javax.mail.Service.connect(Service.java:125)
	at javax.mail.Transport.send0(Transport.java:194)
	at javax.mail.Transport.send(Transport.java:124)
	at Class1.<init>(Class1.java:69)
at Class1.main(Class1.java:90)
end
Process exited with exit code 0.

any help appreciated

Cross-post: mail error